Advanced search
Start date
(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Influence of Particle and Air-Abrasion Moment on Y-TZP Surface Characterization and Bond Strength

Full text
Martins, Samira Branco [1] ; Abi-Rached, Filipe de Oliveira [1] ; Adabo, Gelson Luis [1] ; Baldissara, Paolo [2] ; Fonseca, Renata Garcia [1]
Total Authors: 5
[1] Univ Estadual Paulista, Araraquara Dent Sch, Dept Dent Mat & Prosthodont, Sao Paulo - Brazil
[2] Alma Mater Studiorum Univ Bologna, Dept Oral Sci, Bologna - Italy
Total Affiliations: 2
Document type: Journal article
Web of Science Citations: 1

Purpose To evaluate the influence of particle and air-abrasion on the surface characterization and shear bond strength (SBS) of a Y-TZP ceramic with a resin cement. Materials and Methods Y-TZP specimens were air-abraded with 50 mu m alumina particles; 120 mu m alumina particles; 30 mu m silica-coated alumina particles (Rocatec Soft); 110 mu m silica-coated alumina particles (Rocatec Plus). Air-abrasion was performed before (BS); after (AS); before and after (BAS) zirconia sintering. Surface characterization included roughness (n = 10), wettability (n = 10), morphology (n = 2), and elemental composition (n = 2). For SBS (n = 11), composite resin discs were bonded to the air-abraded and silane-treated zirconia surface, with the resin cement RelyX ARC. Failure mode was determined. Roughness, wettability, and SBS data were analyzed by two-way ANOVA with pairwise interaction and Tukey's test (alpha = 0.05). Results Air-abrasion performed with coarser particles at BS and BAS moments provided the highest roughness values, while the lowest roughness values were observed with particles combined with AS moment (p < 0.01). Rocatec Plus provided lower contact angle than the 120 mu m alumina particles (p = 0.013), and BAS exhibited lower contact angle than BS (p = 0.002). The combinations 120 mu m/BS and the silica-coated alumina particles/AS and /BAS showed the highest SBS (p < 0.05). The combination of each particle/BAS was statistically similar to the same particle/AS. Failure mode was 100% adhesive for all groups. The interaction particle size/air-abrasion moment determined the morphological pattern. Silicon was observed only in the Rocatec groups. Conclusions Roughness was influenced by the particle size and was higher when the zirconia was air-abraded in its green stage. The particle composition played an important role in the wettability and both studied air-abrasion moments provided similar wettability than the one in which air-abrasion is usually performed. The highest SBS values were observed in the three moments, by using certain particles for each moment. (AU)

FAPESP's process: 12/08534-1 - Evaluation of the influence of particle size and air-abrasion moment on surface characterization (composition, morphology, wettability and roughness) of zirconia and on bond strength with resin cement
Grantee:Samira Branco Martins
Support Opportunities: Scholarships in Brazil - Master